Asmo Co., Ltd.

Nobuyuki Matsumoto

Kazunobu Kanno

Hideyuki Yagi

Masanori Takeuchi

Keiji Inoue

Takayoshi Sasaki

Koji Kidowaki

Nobuyuki Imai

A coupling apparatus is provided with a first coupling member, a second coupling member and a damper member. The damper member is arranged between the first coupling member and the second coupling member. At least one of the first coupling member and the second coupling member has a tubular circumferential wall surrounding the outer circumference of the damper member. Accordingly, it is easy to control the diameter of an accommodating hole accommodating the coupling apparatus.

Coupling apparatus, motor device, and wiper motor device

In a forging process step, a small diameter portionis formed in the leading end portion of a cylindrical shaft material, and an installation depressed portionis formed on a base end face of the shaft materialfor installing a balltherein to receive thrust force, by cold forging process using a forging mold. In a worm forming process after the forging process step, a wormis formed in the small diameter portionby rolled dies. The small diameter portionand the installation depressed portionare formed by cold forging process, so that an outer circumferential face of the small diameter portionand an inner face of the installation depressed portionbecome even surfaces with small surface roughness.

Manufacturing method of armature shaft, armature shaft and rotary electric machine

Growing community of inventors

Hamamatsu, Japan

Nobuyuki Matsumoto